Arrangement in ventilatory treatment of the lungs

Abstract

The invention relates to a valve arrangement in the ventilatory treatment of the lungs of a living creature ( 2 ) under a state of anaesthesia, comprising valve equipment ( 4 ) devised to carry an insufflation gas and/or an insufflation gas mixture from a lung ventilation unit ( 3 ) into the lungs and airways ( 2 a ) of the living creature ( 2 ) and allow expiration of gas and/or gas mixture held in the airways. The said valve equipment ( 4 ) and a combination of sensor units ( 61, 61 A, 62 ) are arranged in close proximity to one another. They are inter-connected by an end section for a bundle of tubing ( 30 ) from the lung ventilation unit ( 3 ), and the said sensor units ( 61, 61 a, 62 ) are located closer to the said living creature ( 2 ) than the said valve equipment ( 4 ).

1 . A valve arrangement in the ventilatory treatment of the lungs of a living creature under a state of anaesthesia, comprising valve equipment devised to carry an insufflation gas and/or an insufflation gas mixture from a lung ventilation unit into the lungs and airways of the living creature and allow expiration of gas and/or gas mixture held in the airways, a sensor unit in gas-measuring equipment, the sensor unit being devised to sense the velocity-related pressure gradient in measuring the velocity of the insufflation gas and the duration of the insufflation phase, a sensor unit devised to sense the velocity-related pressure gradient in measuring the velocity of expired gas and the duration of the expiration phase, a sensor unit for measuring the pressure of the gas and its variation in pressure over time and/or a sensor unit for diverting part of the gas mixture for measuring the presence of and/or percentage of one or more gas components in the gas mixture, characterized in that valve equipment has a valve housing consisting of at least two parts, and these parts can be conjoined or separated by means of an end-related rotary movement.  
   
   
       2 . An arrangement according to  claim 1 , characterized in that the said rotary movement is arranged around an axis of rotation at the end of a section of tubing intended for e.g. insufflation gas.  
   
   
       3 . An arrangement according to  claim 1 , characterized in that the end of at least one section of tubing has the shape of part of a sphere.  
   
   
       4 . An arrangement according to  claim 1 , characterized in that a ring-shaped gasket is arranged between the parts in one of the parts and has the external shape of part of a sphere.  
   
   
       5 . An arrangement according to  claim 3 , characterized in that part of the sphere formed by the ring-shaped gasket is truncated by two planes located on either side of the centre of the sphere, forming small circles with the same or different diameters.  
   
   
       6 . An arrangement according to  claim 1 , characterized in that one of the said two parts has a system of channels for connection to a means for coupling a plurality of tubes, preferably gathered in a bundle of tubing.  
   
   
       7 . An arrangement according to  claim 1 , characterized in that one of the parts has a lid devised for sealed contact with a membrane in a valve located between the parts.  
   
   
       8 . An arrangement according to  claim 1 , characterized in that one of the parts has a number of channel-closing first coupling means.  
   
   
       9 . An arrangement according to  claim 8 , characterized in that the said first coupling means is devised to enclose the second part's second coupling means.  
   
   
       10 . An arrangement according to  claim 4 , characterized in that the elasticity of the said ring-shaped gasket is such that the first and second coupling means can made to interact axially during relative movement of the first and second part.  
   
   
       11 . An arrangement according to  claim 1 , characterized in that one of the said parts is provided with a locking arrangement for firm locking to the second part when these parts are conjoined.